its in the automate option under file. File>Automate>Merge to HDR
it has all the same options as photomatix after that, except the tone mapping. (god i love tone mapping) but i still take my photomatix pics and run em thru photoshop to adjust the levels and stuff a little.
im runnin CS2, i have 3... but not a good enough computer. lol
youve just inspired me to retry some of my already done shots to try em with photoshop. lol heres my latest 5 of my friends mitsubishi lancer ralliart





i dont really care too much for the last one, but i had my camera set up wrong. i use AEB but once and a while i change the settings on my own... so it was set to +2 on the exposure thing, i set the AEB to 3@2, so -2, 0, +2. but since it was already at +2, it went to 0, +2, +4.
i didnt notice and didnt feel like re-shooting it. lol so heres what she gets.

Edit:
Here is a link to the set of photos, including full sizers if ya care to check em out.
(was going to end up on another page so u might have missed the preview)