OK a more intensive howto. First you need to have all of you contacts vcards copied into your N900. It's best if you can put them all into the same location (i.e. in a folder under Mydocs). And the command to use depends on the files names of the vcard files. Evolution used the extension '.vcf' when I export my contacts. If you copied all of you contacts vcards to a separate folder it makes things even easier.

I'll give step by step for 2 scenarios. First files named 'xxxx.vcf' dumped into MyDocs along with everything else.

1. Start up the X Terminal application
2. enter the command the following commands

That will concatenate all of you individual vcards into a large vcard file called 'combined.vcf'

3. Go into Contacts -> Menu -> Get Contacts -> Import contact file.
4. drill down into your named N900 folder and you should see the file 'combined.vcf'
5. Select 'combined.vcf' and let Contacts do it's thing.


Another scenario, you copied all of you contacts to a folder under MyDocs (i.e. the 25GB mass storage partition). Let's assume the folder name is called 'contacts'.

1. Start up the X Terminal application
2. enter in the following commands

Note: in this case it doesn't matter what the vcard file named as. The asterisk ('*') wll pick up all of the files in the contacts folder.

3. Go into Contacts -> Menu -> Get Contacts -> Import contact file.
4. drill down into your named N900 folder -> contacts folder and you should see the file 'combined.vcf'
5. Select 'combined.vcf' and let Contacts do it's thing.

Edit: And yes, syntax for those commands is very important. But you really can't hurt anything if you get it wrong.