Create Payment term named as 25% installment
Create 4 Schedule lines each having percentage as 25% and net days as 30, 60, 90, 120 respectively
Create Invoice (Vendor) for business partner Patio Fun, Inc and payment rule as "On Credit" and Payment term as created in #1 (25% Installment)
Create a Invoice line for a product Azalea Bush and make the qty as 10, unit price as 100 and tax as Exempt.
This would make a grand total of $1000
Complete Invoice (Vendor)
Goto Payment Selection (Manual) window ( this happens in Payment Selection window as well)
Select business partner as Patio Fun, Inc
List will show 4 payments of the invoice created above with payment amount as $250 which is correct
Now select the first due payment of $250 and process it.
Now refresh payment selection (Manual), all other pending payments of $250
Attached is the patch for Payment selection (manual) and I am working on Payment Selection window