HI Yves!
There are many ways to do that.
You can load sked-b22.csv to OpenOffice calc, then remove additional columns and put needed colums to right order.
Actuallly you need just station frequency and name from file. Then you have to create columns mode and bandwidth and auto fill them with same content . i.e. put first line of column text AM, click the cell and click the right bottom corner square dot of the cell with mouse left and keep it pressed while pulling downwards. You get all lines filled with AM.
Same with bandwidth. Write 2400 to first line column then do same as with AM, but now because is question of number you have to keep Ctrl-key pressed while pulling mouse downwards. Otherwise the number will grow by one on every line.
When columns are moved to right order Freq-mode-bandwidth-station name save the result using cvs format and ; as delimiter.

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Lot more faster and easier way is to do with command terminal.
Open command terminal and change to download directory where you have sked-b22.csv file.
Lets say it is in your "Download" folder:

cd ~/Download

Then type (paint/copy/paste from here to command terminal) next line:

while read -r line; do awk -F";" '{print $1";AM;2400;"$5}'; done < sked-b22.csv

if the list looks good in terminal then add " > sked_modified.csv" at the end of command line so that it looks:

while read -r line; do awk -F";" '{print $1";AM;2400;"$5}'; done < sked-b22.csv > sked_modified.csv

Then use " sked_modified.csv " for Cqrlog import.

if you get error check the spelling of line.
If line is ok then check that you have command "awk" installed. Type just (ending with enter, of course):

awk

If you have error you must install awk:

sudo apt-get gawk

And the try again.