IPN Handler for Classic ASP / MSSQL

I've got a website running on Classic ASP and MSSQL server and I'm using WarriorPlus to handle the membership subscription payments.

WarriorPlus provide IPN functionality and will send a data package to my site... but I can't work out how to read that data and get it into a format I can use.

I'm attaching a text file with an example of the data WarriorPlus is sending... I basically just need...

WP_ACTION
WP_BUYER_NAME
WP_BUYER_EMAIL
WP_SALE_AMOUNT
WP_AFFUSER
WP_SUBSCR_STATUS
WP_SUBSCR_PAYMENT_STATUS

If you can get me those values into ASP variables and I can do the rest!

Thanks in advance,

Matt