Module development and code questions

I am looking for a way to set access/edit permission for singe albums in the image gallery module, (i.e. I create an album and want some roles to be able to only see it and other roles to be able to upload pictures etc., and then I create another album and want different permissions for that one)
but can't find a way to do this.
Any help on this?
And if it's not possible, is there another gallery module where this is possible?

Maybe I've missed a step on this one but here goes.

I have a Drupal installation that ultimately contains a Flash application. That Flash application needs to interface, to a small degree, with Drupal. So, instead of reinventing the wheel, I thought I'd piggyback off of Flash Remoting and XMLRPC. (This may be my fundamental flaw here.)

Is there a mailer that has any of the following functionality?:

- The ability to send email to all users based on user group.
- The ability to pre-populate the email with the referral URL (for example, if someone click on the Mail Function from page 1 of a book, it should be able to populate the email with the location of page 1 of the book)

If not, I would be willing to pay for a working module that can do these simple tasks.

I'm getting double slashes "//" in url. For example..... http://www.example.com//?q=node/1

At near the end of the url, there is a double slashes.

I have been customizing the code all last night and today encountered this. The problem is I cant remember exactly what I changed. i have been changing alot of codes, and removing some codes.

I checked function l() and function url() but those code was untouched

how to hide locked menu item in the navigation menu ??

I was trying to create a custom module... I was looking at how other modules where developed and copying ideas.

I came across this PHP statement and I couldn't understand what it really was trying to do...

can someone please help me out... what does this mean?

switch($op ? $op : $action){
case '1':
do this
break;

case '2':
do this
break;
default:
do this
}

What does the "$op ? $op : $action" do?...

Thanks in advance