Stony Stevenson writes: In a move sure to provoke controversy, Microsoft wants the designers of the XO laptop to add a port through which the storage capacity required by Windows XP can be added to the system. Making the laptop compatible with XP would give students in poor countries access to "tens of thousands of existing educational applications written for Windows," said James Utzschneider, a Microsoft general manager, in a blog post Wednesday. Utzschneider says a shrunken version of Windows XP could potentially run on 2 Gbytes of flash memory. The XO, however, can only hold 1 Gbyte. As a result, Microsoft wants the XO's designers to add a slot through which more memory can be added via a secure digital (SD) card, Utzschneider said. Microsoft's renewed interest in participating in OLPC might be viewed by skeptics as an admission that a rival offering for developing markets called Classmate — which uses an Intel processor on Microsoft software — has failed to catch on.