FrontRunner Development Corp, Van Nuys, has a collaborative software development pact with Paperback Software International, Berkeley, under which it will develop add-on products for Paperback’s VP-Planner spreadsheet with Paperback promoting the products through co-op advertising and co-marketing ventures – first up will be the $200 CPA+ integrated, double-entry accounting package written to work with VP-Planner, and the $70 MacroTools, a library of macros designed to help users get the best out of the spreadsheet and the multi-dimensional database within VP-Planner.