Fixed: AW_Sarp2 (Subscription + Recurring Payments Module) conflict with IWD_Opc (Checkout Suite)

paypal-sarp2-error
If you’re using Aheadworks Subscriptions and Recurring payments with IWD One Page Checkout (Now IWD Checkout Suite), chances are, it won’t work without modifying IWD OPC’s module files. You won’t get redirected to PayPal, because you’ll get a message that says “PayPal does not support processing orders with zero amount. To complete your purchase, proceed to the standard checkout process.”

In order to use AW’s Subscriptions and Recurring Payments module, you need to activate PayPal Express checkout, then modify two files inside your OPC folder.
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