I have a Linksys WRT54G version 4 router. The firmware says v.4.20) I have tried to flash it with some firmware from linksys info (sveasoft) and it will not flash. I also flashed my version 2 routher with the new firmware from the linksys site it appears that if you have the linksys firmware of version 4.20 or later you are unable to use the third party firmware. Is this the case please let me know. I really could use someone's expertise. Please tell me what am I doing wrong? If possible please tell me of another brand and model of router that I can use third party (linux based) firmware on.