V3 comes with a V3toV2 version, which is shaped and mapped like regular V1/2, so you can make use of your V1/2 clothes and textures. You won't be able to make use of V3's morphs this way. There are also some .uvs files at DAZ that will remap the full V3 to take V1/2 textures, so you can take advantage of your old textures and V3's morphs. You won't be able to use V1/2's clothes properly this way though. However, V3 specific freebie clothes are becoming available now. Poses will need slight adjustments. Hope this helps.