Ravi,
It sounds like you're interested in the EBS / OTM integration and unfortunately this isn't currently covered within any Oracle training course that I'm aware of. In fact, there is very little documentation out there to help - one of the biggest problems I hit while helping several clients implement this. I recently gave a workshop at OAUG Collaborate '07 on this topic and have just posted my presentation deck here on the forums (
http://www.otmfaq.com/forums/f24/int...-pitfalls-212/)
If you have specific questions, feel free to reply to that post and I'll answer as best I can -- plus I'm sure it will be of interest to others on the forums.
BTW - there really isn't a difference between OTM and G-Log/GC3 - it's the exact same product. So far they've updated the UI and made some hooks to integrate with EBS. I expect it to take a while before OTM has been fully "Oracle-ized".
Thanks!
--Chris