enable the module for other content types than the default "event" type

I don't see anything either

this is a duplicate of http://drupal.org/node/275468 but that one is filled against 5.x
basically the module assumes your event enabled nodes are of type "event", it should actually check the signup enabled status of the node..
content access is NOT an alternative to this because it doesnt restrict the signup operation, just the view, and so it doesnt work with payed signups

Yes, we had to fix this on our site. Here is what we did:

around line 14 we have:
if(strpos($form_id, 'node_form')) { // if ($form_id == 'event_node_form') { //changed because it obviously won't let us do what we want

around line 63:
//if ($node->type == 'event' && $node->signup) { // Why should this be restricted?
if ($node->signup) {

I pasted the comments so you could see the before and after.

You also need to run this on the database table (if you use a prefix, make sure to change the name in these queries).

alter table signup_restrict_by_role drop primary key;
alter table signup_restrict_by_role primary key (nid, rid);

Otherwise, you can't select multiple roles to allow. I found this out because I enhanced this module to allow requiring ALL the roles you check (well, I'm in the process of it).

I might create a separate issue or a patch for the table issue if I have some time...if anyone else wants to mooch my information here and do it, please do!

heres a patch for this, goes against 6.x-1.1 and fixes this, you might need to _uninstall_ the module and install it again for the primary key fix to take..or do it manually :-)

nicer title :-)

Please see commit #461612 - I have addressed a bunch of these issues, and I believe that it's working as intended now.

Please let me know if you have any other issues!