Digital BW, The Print

Had to do some internal architectural shoots a couple of weeks ago 
that necessitated the nasty end of some wide angle lenses.  I can 
cope with correcting converting verticals but I have not found a 
method to correct pincushion distortion in Photoshop.  I know I'm not 
really in the right forum for this question but if I promise to use 
my VM set will someone pllllease help me out....

Thanks ;-)

Steve