If you go to the program files folder, I think this may work...go to Adobe Photoshop 7.0 (or whatever Photoshop version you have). There will be various folders in there. Hopefully, there's a folder called 'Required'
If so, double click and you will see something that says 'Default Brushes', I don't know...*gasp* I tried doing it and maybe it won't work. It's worth a try...you can try placing that document of brushes in that folder. Um...yeah *sigh*
So sorry, I'll try to find other alternatives.
Oh wait: In the Adobe Photoshop folder there's probably another folder that says 'Presets', in there is a folder called 'Brushes' . You can maybe try to copy and paste the file in there. Hopefully it will appear in the Photoshop program. I accidentally deleted the file, but I'll try to do it. Hope it works.

EDIT//
I GOT IT. Yay. After you have saved it or whatever, go to EDIT on Photoshop, then scroll down until you see 'Preset Manager...'
Then just load the swirls. It's really easy. yay!