is ubuntu 9.04 conpatable with my compaq 5000

Download an iso image of of 9.04, do a md5 check sum, write it, and boot into the Live CD (Try Ubuntu without installing). If everything works then you can install after backing up.

PS: Did u mean 9.04 (Jaunty) or 9.10 (Karmic) ?

yes sir i ment 9.04 (jaunty) im sorry to bother you agine but can you but that in trem that a computer dumb person can under stand. i mean i think i know what your say. download it and run it not install it. should i do all the updates that the update manager shows for like linux and stuff

Sorry, to be very short earlier. I will give you a detailed step by step process this time.
1. Download the Jaunty iso.
Go to http://releases.ubuntu.com/jaunty/ to download for your architecture, if unsure, select PC (Intel x86) desktop CD.

2. Do an md5 checksum.
See instructions here, https://help.ubuntu.com/community/HowToMD5SUM

3. Write the iso to a CD.
You can see this page for help on that. https://help.ubuntu.com/community/BurningIsoHowto

4. Check your CD for integrity.
See this page. https://help.ubuntu.com/community/Installation/CDIntegrityCheck?action=show&redirect=CDIntegrityCheck

5. Boot from Live CD
Insert the CD. Restart your system. You should go into the CD. Then, select your language and when you get to the next screen, select "Try ubuntu without any change to your computer," it is the first option. If you want a picture of the menu, its here https://help.ubuntu.com/community/LiveCD?action=AttachFile&do=get&target=804+Live+2+.png

Once you boot into it and find to trouble, your computer is compatible and you can restart and select Install Ubuntu. Please feel free to ask if you face any trouble.

thanks and if you dont mind me asking you one more thing? should i do the updates the update manager tells me to do like linux image gerniric and stuff like that
and by the way you are more helpful than the computer store i got the computer from and your every smart with ubuntu i really like the system i hope it works i think its better than windows

It is strongly recommended that you install all the security updates and recommended that you install the updates, there are bugs in Ubuntu, but most of them get fixed along the way and that is what these updates are.

thank you a lot if i could ask you to email me so i could geet your help with other stuff my email is <email address hidden>

I would prefer you use Launchpad or http://ubuntuforums.org/ for your doubts, that way a lot of people see them at the same time. If you know, how to use IRC, please do ask in #ubuntu or #ubuntu-beginners-help, that would give you help faster. If you don't know how to use IRC, please see this https://help.ubuntu.com/community/InternetRelayChat

ok im sorry to bother you agian but if ubuntu 8.10 works on my computer now would that mean that 9.04 would?

No, it does not necessarily mean that. There "could" be problems. Easier to check with live CD so that you're sure it works.