Kewords question

The following information is required to get an answer:
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful):not public, sorry
Gallery version:v1.5.2-pl2
Apache version:Windows IIS
PHP version (don't just say PHP 4, please):PHP 5.1.2
Graphics Toolkit:ImageMagick 6.2.6-1
Operating system:Windows 2000 Advanced Server
Web browser/version (if applicable): n/a, but primarily Microsoft IE

I have installed Gallery1 and integrated it into PMWiki(freeware PHP wiki) My question is in regards to image keywording. The powers that be would like to require users to supply a minimum number of keywords with each photo. Is there anyway to do this in Gallery? Any help, even just a pointer in the right direction will be greatly appreciated