In short lines (from what i heard) IT CAN'T be done... I.e. Caching EVERYTHING with an apache proxy server.
In more detail.... apache doesn't act as a normal browser that where you downloaded a *.swf for example and EVEN if you unplug internet, that *.swf will continue to run for that session...i.e is ignoring the header response who said not to cache it locally for example.... Technically i think apache It could be done to IGNORE headers that says not to cache, BUT from thinking till actually doing it is a long way... (Some suggested rebuild it as a custom from sources since is open source... -_-)..
The Good side if i can call it like that.... is that i managed to cache stuffs (Not All i want it...just some)...
first my link http://noodlecode.net/2011/08/apache-caching-proxy-server/ is for apache 2.2 (stupid me -_-')..and i had 2.4... but made the modifications

, then i changed the CacheEnable disk / to CacheEnable disk http://.... after that i just trialed and error a lot of things people suggested to diagnose WHY isn't cached EVERYTHING... -_-' waste of time when apache simply doesn't act as a browser and to ignore headers that are telling NOT to cache... anyway this was final version in case anyone else is thinking to make a proxy server cache under apache 2.4
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
Listen 3128
NameVirtualHost *:3128
<VirtualHost *:3128>
ErrorLog "logs/proxy-error.log"
CustomLog "logs/proxy-access.log" combined
<IfModule mod_proxy.c>
ProxyRequests On
ProxyVia On
<Proxy "*">
Order deny,allow
Deny from all
Allow from 127.0.0.1
</Proxy>
</IfModule>
<IfModule mod_cache.c>
LoadModule cache_disk_module modules/mod_cache_disk.so
CacheRoot "c:/xampp/apache/proxy/cache"
CacheEnable disk "http://"
CacheDirLevels 5
CacheDirLength 4
CacheMaxFileSize 10485760
CacheMaxExpire 2592000
CacheHeader On
CacheDetailHeader On
</IfModule>
</VirtualHost>
The rest instructions what to create , where, etc are same as here http://noodlecode.net/2011/08/apache-caching-proxy-server/...
In the end... As a bonus

...If You REALLY, REALLY want a thing that caches almost EVERYTHING,

HandyCache from handycache.ru/... Use Google Translate, read what you must do, and you will manage to cache 99.9 of a webpage... things couldn't be cached were the google ads LOL... I assume is cuz those things are more complex and change frequently or time, token based ...have no idea.... BUT everything else was ok. In my case was a page containing flash elements.... that with apache failed to load (due to headers response), BUT with Handy Cache running perfectly.

. If you read so far...

You are very patient. Thank You anyway to those 20+ people reading my post!.. or clicked by mistake!

Cheers!