It's quite simple actually, the way I use it is even easier but since it involves a modified exe, I can't release it without the permission of the creator of VMKPal.
However, if you want to use VMKPal you can, and you don't need any special knowledge to do it.
First, download VMKPal from
http://www.vmkpal.com/Download.aspx
Next, open it.
When you're on the start page (seen above) in there press CTRL + L on your keyboard. This will open a dialog. Type
http://game.myvmk.com/pal.php into it and press enter. Then, enter your username and password for MyVMK as you would normally.
There you go, MyVMK will then be loading on the original VMKPal! Of course, you can't use it to manage your accounts, but everything else works fine! If you're using Windows 8 the magnifier feature doesn't work, but everything else should.
EDIT: I should probably point out Geggy pointed out the CTRL + L thing to me, so thanks to them for that. Secondly, the VMK is open/closed timer is obviously wrong!