old pc

I have a XPS B733. Getting a new comp. Ultra old. Took apart a broken comp for a dollar. Would it be possible to add 512 RAM and DVD drive and 40 GB hard drive. STats:
http://www.pcpro.co.uk/reviews/1369/dell-dimension-xps-b733.html

512 RAM
What kind of RAM is it? Is it compatible with your motherboard?
40 GB hard drive
Is it SATA or IDE?

You need to be more specific, we can't read your mind here.

2 256 Crucial tecnology RAM Sticks. = my 512
The Hard Drive is a 40 GB Western Digital. Its IDE. I don't know much about this but will it work. Oh ya my Hard Drive is a... I don't know.. I think a Intel 810e.

I mean I think my motherboard is a Intel 810e