well, for your second question,
I was once flipping through this book entitled: "DHTML and CSS for the World Wide Web: Visual QuickStart Guide" 3rd edition I believe -- and the author gave a [biased] comparison of dhtml vs. flash.
http://www.amazon.com/exec/obidos/AS...810718-6141534
he stated that dhtml was more efficient and gets the job done -- however, flash is well, more flashy. Pending on what you want -- each has their own strengths and weaknesses.
goto your local bookstore and flip through it to read about it more.
Some other factors on your side are the cost of flash. Flash MX 2004 professional is running at $700 retail. DHTML is "free".
Both will require diligence as they both have large learning curves.
I use flash and it has a photo album template -- and here is another site that may be of help:
http://whatdoiknow.org/archives/001629.shtml
If your client wants ease of use and customability? I think he is asking for a nice ride to the moon -- right now web photo albums are "either or".
It's hard to get both right now.
I'm not sure if this topic is dead, but give us more details if you need more help.
Soral 3.0