ipkg package cannot creat directory

[NLBADB0Y]

I have flashed my WL500g router with the latest version of Oleg's firmware 1.9.2.7-7e. Then I followed mascat.com his tutorial about setting up the ipkg package tutorial. Everything I did was the exact same way as in the tutorial. I even used a 256mb USB Stick. Next was setting up Samba so i could access the USB memorystick. I did not use the tutorial for this but used the menu in the router. I then had only read access but this was solved by adding $ to the share in Windows XP.

Now i want to continue setting up lighttpd but when I want to do the first step

/opt/bin/ipkg update

I get the following error:

[NLBADB0Y@WL500g root]$ /opt/bin/ipkg update
sh: /opt/bin/ipkg: not found

When I try to creat a directory it says:

[NLBADB0Y@WL500g root]$ mkdir /opt/tmp
mkdir: Cannot create directory `/opt/tmp': Read-only file system

If I now look on the USB memory stick using my windows xp computer I do not see a directory /opt/.

I do not know what happened here and I also do not have permission to creat directories anymore.

Please help as its probably something stupid but I am really a n00b when it comes to Linux.

[NLBADB0Y]

stupid stupid me

mount /dev/discs/disc0/part1 /opt < enter >