What would you need formmail for ? VH supports php mail() and we also have ana excellent form processor for free:
Advanced BlueVoda Form Processor
Also, in the Treasure Chest, you have
Form Maker Pro
Last, if you insist on using a CGI script, you have Sendmail preinstalled.
If you need to install FormMail simply create a cgi-bin folder inside your public_html and install FormMail there. Look at the script help files for instructions.