[cinq]

There were file changes in the vb3->vb3.0.1 upgrade in init.php but i doubt it will affect this hack.
I installed this hack on 3.0.1 direct without any problem.

Do you have access to phpMyAdmin or something to view your current database ?
If so, check to see if the following tables are there :

vbgarage_users
vbgarage_comments
vbgarage_images

If they are there, your tables are fine.

Then go to the Settinggroup table, check to see if u have a 'vbgarage' entry.

Go to your settings table. check to see if u have the following entries :

vbgenable
vbgcomments
vbgmaxupload
vbgmaxfilesize

Hint: sort by varname in desc order, so these should be listed first.

If these are all there, there shouldn't be a problem of you as admin not having the option to give access to vbgarage to specific usergroups in your admincp.