write a perl script or kornshell reading a two files and outputting to comma format

Shell Programming and Scripting
1

Hello
Can someone help me to write a perl script or kornshell reading a two files and outputting to comma format.

Here is the two files
listofdisks.txt
id, diskname, diskgroup, diskisze(GB), FC
1, CN34, GRP1, 30, FC_CN34
2, CN67, GRP5, 19,
4, VD1, GRP4, 23, FC_VD1
6, CF_D1, GRP10, 23,
10, CN1, GRP4, 20, FC_CN1
11, vcD1, GRP1, 5,

second file
listofhostmappedtodisks.txt
hostname, diskname
CN12A, CN34
CN3C, VD1
CN12B, CN34
CL2, CN67
CN3A, VD1
CN3B, VD1
DF1, CF_D1
F1, CN1

The out should look like this:
OUTPUT
id, diskname hostname diskgroup diskisze(GB) FC
1, CN34, CN12A/CN12B GRP1, 30, FC_CN34
2, CN67, CL2, GRP5, 19,
4, VD1, CN3C/CN3A/CN3B, GRP4, 23, FC_VD1
6, CF_D1, DF1, GRP10, 23,
10, CN1, F1, GRP4, 20, FC_CN1
11, vcD1, GRP1, 5,

Thanks for your help in advance
Deiow