LEGO Indiana Jones 2 for Nintendo DS and Sony PSP
Please follow this link for the complete walkthrough for the PC, PlayStation 3, and Nintendo Wii version of LEGO Indiana Jones 2: The Adventure Continues.
I do not yet have a walkthrough for the DS/PSP game. If you need help, I encourage you to check out these excellent walkthroughs:
Eric Dent's walkthrough on GameFAQs.com