Best to put these 'unofficial' maps on a MicroSD/SDHC card to use with your 2595LM. Make a folder named Map and you can put multiple maps in there with any convenient name, as long as the ext is .img. e.g. 'Thai_Dual_2012.30.img' or anything that suits you. You can also put the Map folder in the root of your unit's internal memory, but i wouldn't. If any map causes problems on an sd, just take the card out and the unit will function normally....