After adding support for netbooting LessLinux by downloading the ISO image via HTTP/FTP I can announce support for NFS boot. For this feature you just need to add
In this case, the NFS share is mounted read only (and no locking takes place), then all ISO files down to depth 2 are searched, loop back mounted and scanned for the proper version.txt. If the system is found, the settings for toram=value take place. In reasonable fast networks you should keep this threshold low, then the start of a program via network is quick, on networks with bad latencies you might set a low threshold to copy the entire system to RAM during startup.
You might download the ISO and the sources here: