Building win7 install iso with Acer Drivers

I'm having trouble installing win7 on my Acer One D250. I'm going round in circles but I THINK the problem (setup was unable to create a new system partition or locate an existing partition) is becuase I do not have the acer SATA drivers within my win7 usb install. I have used slipstraming before to create an install disk but do not know what sata drivers to include. I would appreciate any help in pointing me to where the appropriate drivers are. I have tried to use the 'load drivers' option of the win7 install and put the contents of the f6flpy32 folder (the sata driver from the Acer site is SATA_Intel_(ICH7M)_v8.9.1023_Winx86) but it didn't work. I'm not sure I've used the right files.