Upload... you mean like use them in an arrangement..?
If those loops have the right format (mp3, wav, ogg...) you should be able to just drag and drop them into the arranger from any folder. But you can also use the file manager within the Music Maker to search your folders, find the loops and add them...
You did not mentioned version of Magix Music Maker any way.
In Magix Music Maker, we can use different loops in proper formats such as ogg, wav or mp3 but the only problem we can not is adding in Library because Magix Soundpool DVD are made for Magix Music Maker. Therefore the only option is left to use File Manager and browse.
Why we can not use loops from other manufacturers is in the Soundpool DVD there is a BMP file with sound that mention Key and BPM. Therefore just loops for other source or even your own can not be added in the library in general. Because in the Magix Music Maker all Soundpool styles or in the Soundpool DVD these audio files are of same BPM usually.
BUT
I found the way to use loops from other manufacturers in the Library as you are talking about. How? it is easy two things are needed
The loops you got from other manufaturer if you know their BPM and if you got Soundpool DVD that will be helpful.
So, if you clear the above two questions then I may guide you.
I had almost typed my message and all of sudden it disappeared therefore typing again.
Now you know the BPM 125 and 127 right. You do not have soundpool dvd only Magix Music Maker 16 Program you got.
In this case if you know where your Basic folder is go there, usually if not using windows vista Program Files/Magix Music Maker, then search for Basic 16 folder, when you locate that you will find different Styles such as, Techno trance, Hiphop, Ambient etc. Click each folder and click on BPM when you will open BPM you will know the tempo of that Style such as, 80, 125 or 140 etc, when you find a BPM same as your loop 125 and 127 copy the entire folder example:
Hiphop vol1, when you will copy all items inside this folder such as, Drum, Bass Guitar will also be copied so far ok.
Save this copied folder some where like My Music and change the name from Hiphop Vol1 to Hiphop Vol_2 and keep inside contents as it is here, you have to make a new folder inside this Hiphop Vol_2 such as Myloops and put your loops inside.
Go to Magix Music Maker Click on Add style browse your folder saved in My Music named Hiphop Vol_2 it will be added in the library. You just have to use yours Myloop.
I know when you will read this you will feel difficult when you will understand the main forumula how Soundpool works next time it will be much easier for your to make your own library. Try and see