GnuCash and loans

[Richard Esplin]

My biggest frustration with GnuCash is in tracking loans such as a home 
mortgage. The only way I have figured out how to do it is to use a 
spreadsheet to calculate the interest owed each month and then manually add 
it to the loan account. The GnuCash scripting language is not documented, so 
it is non-obvious how to get interest calculated as an automatic transaction. 
How have other pluggers dealt with this problem? Does KMyMoney or Grisbi 
handle this well?

Richard Esplin