You could also do the following:
First uncomment the following lines in your config file:
LoadModule vhost_alias_module modules/mod_vhost_alias.so
AddModule mod_vhost_alias.c
Then add this to your config file
<VirtualHost *:80>
UseCanonicalName off
VirtualDocumentRoot F:/Website/%0
</VirtualHost>
and rename the F:/Website/autumn to F:/Website/www.autumn.phenious.com so that anytime someone calls a sub domain whether it is autumn or anything else it goes to the folder that corresponds with that name this way you only need one sub domain request in your config file.
To make more subdomains just simply create a folder with the address you want as the folder name...