Have fun with this! Do the best you can. The weather sucks so be creative! Don't drop your lens! Ha Ha.
Frankly there is not much out there that is simple or brief for the 30D. Here are the relevant pages from the official Canon 30D manual:
The whole manual in PDF form can be accessed here 30D Manual.
For the 40D there is a video here 40D Video.
The manual is here 40D Manual.
and the relevant page is:
Again, have fun with this! Do the best you can. The weather sucks so be creative!