Menus: Horizontal/Vertical contextual...any ideas...here's an example

using Version Drupal 5.0

ive been try in to figure out a way of creating your standard website menu described as follows:

A horizontal menu across the top of the site with titles such as Home, About Us, Services, Clients, Contact Us

I would like to click into one of these menu titles (eg, Services) and have a vertical menu that contains further menu items that correspond to the 'Services' horizontal menu title, (for example: web design, SEO, Flash, 3D Animation) show up in the Left Sidebar

This doesnt appear to exist, and searching through the forums i am alarmed to see that other users are stating that Drupal fails to achieve this basic navigational functionality that is used on sites the world over as it is generally considered to be the best navigational structure possible, certainly for larger sites.

I have found some work arounds using Blocks, whereby you assign the corresponding 'vertical' menu to the 'left sidebar' whilst in Administer >> Site Building >> Blocks and then configure the 'Block' to only show up on the pages that it applies to like this:

1. Create Primary Link menu: Home, About Us, Services, Clients, Contact Us
2. Using the 'Services' Primary Link as an example, create a 'page' (Create Content) called 'services' and link to it from the 'Settings' Primary Link
3. Create a menu called 'Services' ( and sub menu/items like Web Design, Flash, SEO, PHP) and then assign it to the 'left sidebar' in Administer >> Site Building >> Blocks. Save. Then configure it to only appear on the pages that you then create for the sub menu/items (Web Design, Flash, SEO, PHP...create a page for each link to them from the 'Services' menu items) and also the 'services' page.

Now when you click on the 'Services' Primary Link a page appears called 'Services' with a menu in the Left Sidebar called 'Services' containing items named 'Web Design, Flash, SEO, PHP'. Click on any of the sub items and you will link to the corresponding pages you created...easy

Do this for all the Primary links and you have your Horizontal/Vertical corresponding menus....seems simple

** However
Sometimes with a CMS you create a 'page' that you want to link to from 2 seperate menu items, for example the 'Web Design' item in 'Services' could be the same page as the 'Web Design' item in 'Clients' (you would have to create this in 'Clients' of course.)

If you therefore updated the 'Web Design' page, it will update in 'both' menu links, as they both link to the same page, making site maintenance easier...(if you had separate pages for each link, you would have to update both pages in order to keep the website up to date: easy on a small site, but most CMS's are used for huge sites, so you would only ever want to update one 'page' as it may be referenced from multiple menu links)

The problem is then this...(using the Block method of menus above). The 'Web Design' page will show the 'Services' menu block AND the 'Clients' menu block on its Left Sidebar, as both the 'Services' menu and the 'Clients' menu have been configured to show up on the 'Web Design' page..

Not a major problem you may think, but what if the 'Web Design' page was referenced from within a huge site by 10 separate menus...they would show all 10 menus in the Left Sidebar

Has anyone a solution to the Menu problems with Drupal, as they severely limit its consideration for large websites...which is what i am about to create...

Is there a module, or a solution, or anything....any ideas welcome....please let me know if the above is unclear